4-bromo-pent-4-enoic acid ethyl ester

(2S,4S,4aS,6R,9S,11S,12S,12aS)-2-Bromo-11,12-(carbonyldioxy)-4a,8,13,13-tetramethyl-1-methylene-5-oxo-4,9-bis(triethylsiloxy)-1,2,3,4,4a,5,6,9,10,11,12,12a-dodecahydro-7,11-methanobenzocyclodecen-6-yl acetate

(1S,2S,4S,4aS,6R,9S,11S,12S,12aR)-2-Bromo-11,12-(carbonyldioxy)-1-hydroxy-1-hydroxymethyl-4a,8,13,13-tetramethyl-5-oxo-4,9-bis(triethylsiloxy)-1,2,3,4,4a,5,6,9,10,11,12,12a-dodecahydro-7,11-methanobenzocyclodecen-6-yl acetate

2-bromo-5-(triethylsilyloxy)pentene

(4S,4aS,6R,9S,11S,12S,12aR)-11,12-(Carbonyldioxy)-9-hydroxy-4a,8,13,13-tetramethyl-1-methylene-5-oxo-4-triethylsiloxy-1,2,3,4,4a,5,6,9,10,11,12,12a-dodecahydro-7,11-methanobenzocyclodecen-6-yl acetate